package com.xiaoxiao.regimen.provider;

import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.util.Log;

/**
 * This will be launched during system boot, after the core system has
 * been brought up but befere any non-persistent processes have been
 * started.
 * 
 * It's job is to prime the healthy database. Either create it
 * if it doesn't exist, or open it and force any necessary upgrades.
 * All of this heavy lifting happens before the boot animation ends.
 * 
 * @author jaroad
 *
 */
public class RegimenUpgradeReceiver extends BroadcastReceiver {

    static final String TAG = "HealthyUpgradeReceiver";
    static final String PREF_DB_VERSION = "db_version";
    
    @Override
    public void onReceive(Context context, Intent intent) {

        try {
            long startTime = System.currentTimeMillis();

            // Lookup the last known database version
            SharedPreferences prefs = context.getSharedPreferences(TAG, Context.MODE_PRIVATE);
            int prefVersion = prefs.getInt(PREF_DB_VERSION, 0);

            // If the version is old go ahead and attempt to create or upgrade the database.
            if (prefVersion != RegimenDatabaseHelper.DATABASE_VERSION) {
                // Store the current version so this receiver isn't run again until the database
                // version number changes. This is intentionally done even before the upgrade path
                // is attempted to be conservative. If the upgrade fails for some reason and we
                // crash and burn we don't want to get into a loop doing so.
//                prefs.edit().putInt(
//                    PREF_DB_VERSION, RegimenDatabaseHelper.DATABASE_VERSION).apply(); // support for 2.3 and higher
                prefs.edit().putInt(
                      PREF_DB_VERSION, RegimenDatabaseHelper.DATABASE_VERSION).commit();

                // Ask for a reference to the database to force the helper to either
                // create the database or open it up, performing any necessary upgrades
                // in the process.
                Log.i(TAG, "Creating or opening contacts database");
                RegimenDatabaseHelper helper = RegimenDatabaseHelper.getInstance(context);
                helper.getWritableDatabase();
                helper.close();

                // Log the total time taken for the receiver to perform the operation
                Log.i(TAG, "upgrade finished. used=" + (System.currentTimeMillis() - startTime));
            }
        } catch (Throwable t) {
            // Something has gone terribly wrong. Disable this receiver for good so we can't
            // possibly end up in a reboot loop.
            Log.wtf(TAG, "Error during upgrade attempt. Disabling receiver.", t);
            context.getPackageManager().setComponentEnabledSetting(
                    new ComponentName(context, getClass()),
                    PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                    PackageManager.DONT_KILL_APP);
        }
    }

}
